地震动的3D瞬态特征与结构破坏的关系

从一个异于传统研究方法的角度出发，利用最近发展的地震动8D瞬态参数分析理论，有选择的研究了有关近场地震动记录的8D瞬态特征：通过对典型近场地震动作用下结构模型的算例分析，探讨了速度脉冲型地震动与结构延性需求之间的关系，指出结构破坏固然与地震动的反复作用有关，但对于大多数结构的关键破坏起控制作用的却可以归因于近场地震动的脉冲特性，这对认识结构破坏的根本原因具有重要意义。

3D temporal characteristics of near-field ground motions and their relations with damage of structures

We first review several parameter indices that are used to measure the damage potentials of near-field ground motions from a new point different with traditional approach. Then using a recently developed 3D temporal characteristics analysis, we examine some. near-field ground motion characteristics. Subjected to the excitations of a typical near-field ground, a simple 3D structure model is used to examine the ductility demand of velocity pulse dominant ground motion. Results indicate that although the structural damage is closely related with the reversal action of the ground motion, the large velocity/acceleration pulse of ground otions should be the control issue for the critical structural damage.